As the demand for increasingly diverse types of one-dimensional (1D) materials increases, there is a growing need for new methods to synthesize these types of materials in a simple and scalable manner. Chemical exfoliation is commonly used to create two-dimensional (2D) materials, often in a simple and mass-producible manner, but this method has so far been underutilized to synthesize 1D materials. In the few cases where chemical exfoliation has been used to create 1D materials, the starting compounds have been van der Waals materials, thus excluding structures without inherently weak bonds present. We show here that by choosing KFeS, ionic bonded crystals can be chemically exfoliated into 1D structures.2 As an example. Using chemical exfoliation, antiferromagnetic 1D nanoribbons can be created in a single step. The nanoribbons are crystalline and very similar to the parent compound in terms of structure and intrinsic antiferromagnetism. The facile chemical exfoliation of ionic bonded crystals shown in this study opens the opportunity to synthesize magnetic and nonmagnetic 1D nanomaterials from a variety of starting structures.